Carbureter.



J. G. BURGHARTZ. UARBUBETER.

APPLIoA'rIoN FILED JULY 2s, 1912.

@mmf/'l' JOHANN GUSTAV BURCHARTZ, F (lOLOG'NE, GERMANY.

CARBURETER.

' Specication of Letters Patent.

Application mea July as, 1912. serial No. 711,611.-

To all whom t may concert/ti Be it `known that I, JOHANN GUSTV BUR- CHARTZ, a subject of the King of Prussia,.

and residing at Cologne, in the Province of the Rhine, Kingdom ofl Prussia, German Empire, have invented certain new and useful Spray-Carbureters for Internal-Combustion Engines, of which the following is a specification. Y

This invention relates to spray carbureters for internal combustion engines, in which the composition of the gas mixture which is composed of air and a liquid fuel, is auto,- mat-ically regulated without the aid of auxiliary air passages, auxiliary air, valves,or similar mechanical equivalents, l however great the speed of the motor may be.

The object of the present invention is to supply fuel to the motorl With a uniform` area of air Ipassage, and consequently without the aid of auxiliary' air, to supply exactly the requisite quantity of fuel or various speeds and loads.v

In the accompanying 'drawings Figure l shows a longitudinal section of the carbureter, and Fig. 2 shows a horizontal section o-n the line AQB, of Fig. l.

At a, the fuel passes into the float casing, in which it is kept at a const-ant height in the well known, manner. Through the pipe I) thefuel flows into the chamber c and through the openings d, e, into an injection duct g and a fuel container f. When the motor is not running, the level of the fuel takes the height 71.-2' determined by the iioat. The injection duct g has it opening 1, disposed at a considerably higher level than that of the liquid fuel. The ro-und damper Z which controls the gas mixture has a slot m which may be closed by a screw plug n, and when the damper is almost closed only a predetermined verynarrow' opening remains above `the opening c. The interstice between the opening lc and the damper l is so small that the vacuum and the speed of the air which prevails in the narrowest section, can act in full force'on the opening 7c and take fromg-it suliicient fuel for a certain speed of thelnotor, for in stance, for a given number `of rotations when running light. The gah mixture in this case flows through the slots e, in the damper, to the engine suction pipe.

The fuel container f with the supply in-4 let l and the outlet are primarily influenced on opening the damper Z by the vacuum of no risin the suction tube. When running light, the vacuum and the flow of the air in the vicinity ofthe opening f, g, are 'so small, that no material quantity of fuel is carried away with ithe air current. If the -round damper is' opened more, then the fuel container f takes part in the supply of the fuel.`. When the damper vis fully opened and the heavily loaded motor is runnin slow, then the level high, so that a larger quantity of'fuel particles can be carried away through the openings g. The out-flow from the injection duct' g has not increased in the sameproportion flow at the outletl opening Je, has largely 'increased. As. soon as the speed of rotation yof the motor and the vacuumof the suction kpipe have increased further, there may be seen a sinking of the columnv of fuel in the containerf, andthe fuel no longer escapesy from the openings g 'in streams, but in the form of separate particles, which are in course of evaporation. On .further increase in the speed of rotation of the. motor and ratenteduov. 25, wie.

'65 of the 'fuel in the container will stand fairly nary kind were used. The determining feature for the quantity of outiow is, in the first place, the sectional area of the opening d; butsome importance is possessed by the openings g, the sum of the sectional areas of which amounts to a multiple of the openin Y d. Flow bf fuel from the openings g wil not take placeon the` cessation of the aspi ration in the suction tube for at this moment of the separate particles of the fuel, which has sunk down to the line lll-z', in the container f, can take place.

Owing to thearrangement of the duct and the mode of action o thecontainerf, with the inlet opening d lying below, and the outlet opening g, it follows that there is always supplied to the motor a quantity of fuel which is roportional tothe aspirated air. In order t at this may take place in the los 'io onV the transfer from running-light to the y vfull load,because.the sectional area of the sent a larger quantity thanthat which canspeed of rotation supplies the first increased demand for fuel. Itis moreover necessary ythat on the suddenopening of the damper,

thatis, von the passage from very small to very -high motor speed, or from smaller to greater loading the fuel should flow. from the opening q 1n a closed stream. 'Without the container y, this would not be possible, because the. fuel iowing through the various openings g, in a closed stream would pres enter through the lower opening d at this moment into the container f. As however,

O the quant-ity of fuel which-is in the container f, forms a reserve and can flow ofi' without having to .enter through the opening d into the container f, it is obvious that this quantity of'fuel collected in the space y will flow olf .orbe drawn up through theA opening g this space with uid fuel.

in closed streams, because the container y' is emptied of air through the openings iv. The fuel, consequently, as soon as the damper is fully opened, will pass through the openings q under the vacuum effect thus created, in order to be evaporated and mixed with air'to reach the motor.

The openings w, the areas of which are considerably smaller than that of the `openings g, have, as already indicated the object of causing a removal of air from the space y when the fluidfuel'in the container f rises, andY consequently to admit of the'illing of This fuelwill not escape through the opening on the sudden opening of the round damper, but, as already 'stated will take its course through the opening q, because on the one hand, the openings g being placed at the outer edge of In this the head of the container f are exposed to a stronger suction through the closely passing air current; land on the other hand the vacuum will not be felt through thelnall area of the openings w, because of the much greater area of the openings g. When, on the increased number of rotations and under the conditions above set forth, the level of the liquid fuel in the container f sinks again, then evaporated fuel can also pass away Without injury. through the openlngs m.

Having now described my invention and in what manner thesame is to be operated, what I claim isv 1. In an injection carbureter for internal combustion engines an injection duct g having an outlet 'k lying considerably above the level of the fuel close to a slot fm, of the throttling organ Z, a fuel container'f having vsupply openings g on the level of the fuel,

an inlet opening smaller than the said supply openings q, and a store space y at the head of the fuel container f around and above the supply openings g as set forth.

.2. In an injection carbureter for internal combustion engines an injection duct g having an outlet k lying considerably above the -level of the fuel close to the slot m of the two subscribing witnesses.

, JOHANN Gusmv BURcHARTz.

Witnesses Lotus VANDORN, F. TnnooNnERnND.

Vname to, this specification in the presence of 

